Hertz
Hertz is a unit of frequency measurement that is commonly used in space and astronautical engineering. It is defined as the number of cycles per second of a periodic phenomenon. In the context of space and astronautical engineering, Hertz is often used to describe the frequency of electromagnetic waves, such as radio waves, microwaves, and light waves, which are used for communication, navigation, and remote sensing. For example, the frequency of a radio signal used for communication between a spacecraft and Earth is typically measured in Hertz. Hertz is named after Heinrich Hertz, a German physicist who first demonstrated the existence of electromagnetic waves in the late 19th century.
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